Home / 1,245.34-1,867.38-423.42

Finding the Fourth Proportional to 1,245.34, 1,867.38 and 423.42

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Solution

The fourth proportional to 1,245.34, 1,867.38 and 423.42 is: 634.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.34 : 1,867.38 = 423.42 : x
  2. Step 2: Convert to fraction form
    1,245.34/1,867.38 = 423.42/x
  3. Step 3: Cross multiply
    1,245.34x = 1,867.38 × 423.42
  4. Step 4: Simplify right side
    1,245.34x = 790,686.04
  5. Step 5: Solve for x
    x = 790,686.04/1,245.34
  6. Step 6: Final answer
    x = 634.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.